Post Partum OGGT result

Hi mummies, i was diagnose with GD when I was pregnant. Last friday, I went to the clinic again to do the OGGT to check if my GD disappeared. I got the result today and I failed the 1 hour test but pass the 2 hours. What does it mean? Did anyone experience this. I am still thinking if I need to see the doctor because I feel that it is just a timing issue since the result for 2 hours is ok.